Pith Number

pith:NMKP6XSX

pith:2019:NMKP6XSXUC35RV5IM5O2W6ZN7V

not attested not anchored not stored refs pending

Extreme Low-Frequency Ultrathin Acoustic Absorbing Metasurface

Badreddine Assouar, Krupali Donda, Liyun Cao, Shi-Wang Fan, Yifan Zhu, Yong Li

arxiv:1908.01495 v1 · 2019-08-05 · physics.app-ph

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{NMKP6XSXUC35RV5IM5O2W6ZN7V}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Receipt and verification

First computed	2026-07-05T00:31:54.686342Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6b14ff5e57a0b7d8d7a8675dab7b2dfd6b7636d0e4d015581541fc27f7b2721c

Aliases

arxiv: 1908.01495 · arxiv_version: 1908.01495v1 · doi: 10.48550/arxiv.1908.01495 · pith_short_12: NMKP6XSXUC35 · pith_short_16: NMKP6XSXUC35RV5I · pith_short_8: NMKP6XSX

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/NMKP6XSXUC35RV5IM5O2W6ZN7V \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: 6b14ff5e57a0b7d8d7a8675dab7b2dfd6b7636d0e4d015581541fc27f7b2721c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2b13ecab56b7d92880681ec6a4edb0822f0d9548fa512e9b9b15062eab2640c3",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.app-ph",
    "submitted_at": "2019-08-05T07:21:22Z",
    "title_canon_sha256": "b91321395da6d08c695bc8c376d2e28bb4ea847e05cba59c4b2311310bcb44fe"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1908.01495",
    "kind": "arxiv",
    "version": 1
  }
}